Change CLI naming options

This PR adds general long-form naming options, `--name` and `--description`. At the same time it deprecates the old long-form options `--plate_name` and `--plate_description` in the documentation but leaves them functioning as before. 

Testing
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CLI imports using both `bin/omero import` and `importer-cli` of images and plates using both long forms above should all work. In addition the short-forms `-n` and `-x` should be unaffected. 

`importer-cli -h` should not display the two deprecated options while `bin/omero import -h` should show the options but document them as deprecated.